Why can't I select background images in Pages 5?

Question

So I've got a document with an image of a Gantt Chart, and it's been formatted to be in the background.
When I try to insert a new page before this image, it overlays the text of another page.
Trying to find 'select background images' is no where to be found, whereas in Pages 09, it was fine.
I'm all for simplicity, but removing something like this, and not being able to select this image at all?
Is there anything I've missed?

Answer 1

This is not the answer to the original question but it is an answer to a related problem.
Apparently, Apple removed the simple and useful "Send Object to Background" menu item. For the last half an hour I was straggling to put my signature image under my name in a letter. The image background is white. So, when I insert the image, it is on top of the text and blocking it.
Then, I searched and found this discussion, it helped but not solved the problem. I found a solution inspired by this discussion. Here, what I tried to send an image to the background.
Chose the image in question. When I selected "Arrange -> Section Masters -> Move Object to Page" as suggested in this thread, it moves the image to the background. BUT, the image appears on every page at the same position within the section. If the document is a single-section document (almost all my documents are single-section documents, as I use Pages for short simple documents like letters (in the near future, I'll say "I used to use Pages", as this kind of feature removal makes it unfeasible to use it anymore).
Thus, you have to define a new section which should contain only the page in question. Enough rumbling! Here is exactly what I did:
Let N be the page number on which you wish to put an object in the background.
Go to page N (your cursor must be somewhere on that page)
On the toolbar choose "Setup -> Section Tab -> Create a new section -> Starting with this page"
Go to page N+1
On the toolbar choose "Setup -> Section Tab -> Create a new section -> Starting with this page"
Now, you have a single-page-section on page N.
Put you object on page N
Select the object (image)
On the menu, choose "Arrange -> Section Masters -> Move Object to Page"
Also, I recommend to enable by "Arrange -> Section Masters -> make Master Objects Selectable"
You can put any number of objects on page N by repeating on steps 5 to 8.
The problem is, however, if you continue to edit your document and and sections gets longer, it will start a new page at the end of that section. Which is awful, because you'll have to remove the sections, and start from scratch, or manually move the text from one section to the other. So, do this after you are done with the document. Pity!
If anyone have a better solution it will be appreciated.
-- o --
Now, I will continue to nag, if you allow me. When I open an old Pages document with images in the background, it opens just fine. It is not selectable as the original author stated. This indicate that Pages still support background objects independent of the sections, it just doesn't offer in interface to that facility. Why?
I had a fairly large number of letters and templates I created with Pages. Before it is too late, I'll abandon it.
I have a similar experience with iWeb. Apple promoted it, and then abandon it. Now all of my class pages (http://web.boun.edu.tr/akdogan) look too 2000s style, but I don't have energy to convert them something else at this point, but I'll have to.
So I will continue to use LaTeX for long documents (that has been the choice for a long time), but I'll switch back to almost equally annoying Word for short and medium documents.
Again, pity! I used to like Pages.